%0 Journal Article %A $authorName.trim() %A $authorName.trim() %A $authorName.trim() %T %D 2009 %R %J Journal of Guilin University of Technology %P 371-373 %V 29 %N 3 %X %U http://manu28.magtech.com.cn/Jweb_gllg/EN/abstract/article_1082.shtml